Writing instrument



FIG. 1 is a perspective view of a writing instrument, showing our new design;

FIG. 2 is a right end view thereof;

FIG. 3 is a left end view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a side elevational view thereof, opposite that shown in FIG. 5; and,

FIG. 7 is a front elevational view thereof.

The broken lines shown herein are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a writing instrument, as shown and described. 